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Development of a Focusing DIRC *

By J. Benitez, I. Bedajanek, D. W. G. S. Leith, G. Mazaheri, B. Ratcliff, K. Suzuki, J. Schwiening and J. Uher


Abstract — Benefiting from the recent introduction of new fast vacuum-based photon detectors with a transit time spread of σ TTS~30-150ps, we are developing a novel RICH detector capable of correcting the chromatic error through good time measurements; we believe that this is the first time such a technique has been demonstrated. We have built and successfully tested a particle identification detector called “Focusing DIRC. ” The concept of the prototype is based on the BaBar DIRC, with several important improvements: (a) much faster pixelated photon detectors based on Burle MCP-PMTs and Hamamatsu MaPMTs, (b) a focusing mirror which allows the photon detector to be smaller and less sensitive to background in future applications, (c) electronics allowing the measurement of single photon timing to better than σ ~100-200ps, which allows a correction of the chromatic error. The detector was tested in a SLAC 10GeV/c electron test beam. This detector concept could be used for particle identification at Super B-factory, ILC, GlueX, Panda, etc

Topics: Photodetectors, Cherenkov detectors, RICH
Year: 2006
OAI identifier: oai:CiteSeerX.psu:
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